Torque Tool Controller

The Fathom Systems iVP based intelligent torque tool controller is a field proven fully proportional intelligent valve pack using industry standard directional and pressure control valves.

It provides hydraulic control requirements for all smart Hi-Lo torque tool operations of classes 1 to 5, including FLOT (flying lead orientation tool) and maybe interfaced with all major torque tools currently available including Subsea 7, Forum (Perry), impROV, Oceaneering, Oceanworks, Saipem, Seanic, Zetechtics and Petrobras spec.

Torque Tool Control iVP cropped

The fully integrated subsea unit, typically 3 or 5 functions, is supplied with a dedicated PC operating Fathom Systems Windows® based torque tool control software. The easy to use Graphical User Interface (GUI) guarantees that critical operations can be performed to the highest and safest levels. The system may be interfaced with all standard  API17D and Petrobras torque tools, with an automatic calibration using an RS232 output to the torque analyser. If the RS232 output is not available, the system can still be calibrated by manually inputting torque readings. In the absence of a tool, a simulator is available that verifies torque and turns feedback before diving. Real time torque and turns feedback and a single channel video overlay provide the operator with all the tools required for a safe and successful operation.

 TTC display


  • Compact intelligent valve pack
  • Cost effective field proven technology
  • Hosts all standard smart torque tools
  • Real-time torque & turns feedback
  • Open loop’ or ‘Smart’ fail-safe modes
  • Proportional pressure & flow control
  • Upstream & downstream pressure TXD’s
  • High flow pressure relief valves
  • Optional pilot operated check valves
  • Fully automated calibration capability

Operating Modes

Open Loop Pressure

Pressure and tool speed is manually controlled by the operator. The applied pressure is derived and displayed as the differential from the 2 pressure transducers in the PRV.

Open Loop Pressure

This maintains a set pressure regardless of tool speed. The pressure control valve maintains the working pressure using the differential pressure transducers in the valve pack. Manual speed control allows the operator to slow the tool on approach to the valve stops.

Smart Pressure

This tracks speed and maintains the lowest pressure that keeps the tool turning at a constant speed. If the tool slows down, pressure is increased by just enough to restore the desired tool speed. During the course of the operation pressure will gradually build to maintain rotation but the tool will stall when the set limiting pressure is reached.

Smart Torque

This mode gives closed loop control of torque. Like smart pressure control, this tracks speed and maintains the lowest pressure that keeps the tool turning at a constant. When the tool stalls, it is backed off slightly and stopped. The torque value is then increased above the stall torque and the tool moves again. This is repeated every time the tool stalls until the preset value is reached and the operation is concluded.

Standard System Set-up (Tool, Latches)

NG6 Valve type WDPF-A06 x 1
NG3 Valve type WDPF-A03 x 2
Pressure Control Valve type TS-1036
High Flow Pressure Relief Valves
Upstream, Downstream & Depth Pressure TXD’s

Optional System Set-up (Tool, Latches, Flot)

NG3 Valve type WDPF-A03 x 2
PO Check Valve type BDERV3 x 2


Turns Count: 24 bit, Single Pulse or Quadrature
Depth TXD: 300 Bar 0-5v
System & regulated pressure TXD: 600 Bar 0-10v
Strain Gauge Input: Constant current source to 4 wire strain gauge TXD. Set-up for 350 or 700 ohm bridges for 10v excitation


Electronic 100Hz Loop Control
Hydraulic Working Pressure: 207 bar (max)
Torque Tool Flow: 0¬-24 lpm (cw & ccw)


Depth Rating: 3000msw (optional to 6000msw)
Pressure & Tank: 3/8” BSPP
NG6 Valve, Fill & Drain: 3/8” BSPP
NG3 Valve: 1/4” BSPP
Material: 6082T6 Al Hard Anodised to BS5599, Dyed Black & Dichromate Sealed to 50 Microns
Weight in Air: 19 kg
Weight in Water: 12.5 kg


Power: 24v DC smoothed & regulated
Data: RS232/RS422 (for use with ROV MUX) ARCNET (mini system used for comms between host & slave hardware subsea)
Host Interface: SubConn BH10MSS (spec 44 wire) or Burton 5507-1508
Sensor Interface: SubConn MCBH6FSS x 2, MCBH8FSS x 2 (Spec 44 wire)


Processor, Valve Power Driver, Low Voltage & Diagnostics, Two Channel Fast Counter, Torque Transducer & Torque Tool Interface Electronics
12 & 16 bit analogue and 8 x digital inputs for instrumentation.
Local LED status of telemetry, power supplies, water ingress and alarms visible through viewport

Software Features

Tool Nudge, Tool Direction Control, Emergency Stop, System Presets, Graphical Representations, Password Protection, Automatic Calibration, Alarm Control, Diagnostics Valve and Electronics Operation, Video Overlay, Data Logging

Topside Control

Branded Laptop PC (IBM LeNovo Think Pad), Saitek X52-Pro Joystick & Throttle Suite, USB/RS232 Converter, Optical Mouse. Optional – Panasonic Toughbook CF31 or Mini Dell Optiplex PC

TTC diag01


Revised March 2014. Specifications subject to change without notice.